title: Mass immunization campaign launched to protect 15 million children from polio, as outbreak in Nigeria spreads across West Africa.
mesh_terms: D000293:Adolescent; D000354:Africa, Western / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks / Q000517:prevention & control*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D032541:Mass Vaccination; D009549:Nigeria / Q000453:epidemiology; D011051:Poliomyelitis / Q000453:epidemiology*; D023321:Poliovirus Vaccines / Q000008:administration & dosage* / Q000276:immunology
chemical_list: D023321:Poliovirus Vaccines